Process to make 1,1,2,3-tetrachloropropene

摘要

Disclosed is a process for the synthesis of 1,1,2,3-tetrachloropropene (HCC-1230xa) using 1,1,3-trichloropropene (HCC-1240za) and/or 3,3,3-trichloropropene (HCC-1240zf) and Cl2 gas as the reactants, wherein the process takes place in a single reactor system. Before this invention, HCC-1230xa was made in a two-step process using HCC-1240za/HCC-1240zf and Cl2 gas, and the processing was conducted using two separate reactors.

主权项

1. A process for the synthesis of 1,1,2,3-tetrachloropropene (HCC-1230xa) using an organic starting material selected from 1,1,3-trichloropropene (HCC-1240za), 3,3,3-trichloropropene (HCC-1240zf), or mixtures thereof, and Cl2 gas as the reactants, with a dehydrochlorination catalyst, wherein the process takes place in a single reactor system;
wherein the single reactor system comprises a continuous stirred tank reactor equipped with a total condenser, and a reaction column equipped with a total condenser; wherein the reaction column is separated into four zones comprising (a) a Cl2 feed zone, (b) a reaction zone, (c) an organic feed zone and (d) a clean-up zone; and wherein the starting material is fed into the organic feed zone of the reaction column and flow downward via a liquid distributor, while an excess amount of Cl2 gas is fed into the Cl2 feed zone of the reaction column and flow upward via a gas distributor.